A-Level Computer Science – Operating Systems Explained (Memory Management & Paging) (OCR / AQA) | S2:Ep 1

A-Level Computer Science – Operating Systems Explained (Memory Management & Paging) (OCR / AQA) | S2:Ep 1

New Episode Every Monday

In this Episode we focuses on the functions of an operating system, a critical piece of software that manages computer hardware and provides interfaces. Key areas discussed include memory management, detailing methods like paging, which divides memory into fixed-size chunks, and segmentation, which uses variable-length parts related to program structure. The concept of virtual memory is also explained, where a portion of the hard drive is used to extend available RAM, though frequent swapping can lead to performance issues known as disk thrashing. Furthermore, the document covers interrupt handling, outlining how the CPU responds to signals from hardware, software, or the internal clock using an interrupt service routine and a stack to manage priorities. Finally, processor scheduling is described, illustrating how the OS allocates CPU time to multiple applications to create the illusion of multi-tasking, and various scheduling algorithms are introduced, such as round robin, first come first served, shortest job first, shortest remaining time, and multi-level feedback queues.

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Episoder(72)

A-Level Computer Science – OCR NEA Evaluation Explained (OCR H446) | Bonus 7

A-Level Computer Science – OCR NEA Evaluation Explained (OCR H446) | Bonus 7

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A-Level Computer Science – Dijkstra’s, A* & Travelling Salesman Explained (OCR / AQA) | S12:Ep6*

A-Level Computer Science – Dijkstra’s, A* & Travelling Salesman Explained (OCR / AQA) | S12:Ep6*

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16 Apr 17min

A-Level Computer Science – OCR NEA Post-Development Testing Explained (OCR H446) | Bonus 6

A-Level Computer Science – OCR NEA Post-Development Testing Explained (OCR H446) | Bonus 6

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A-Level Computer Science – OCR NEA Iterative Testing Explained (OCR H446) | Bonus 5

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13 Apr 17min

A-Level Computer Science – Depth-First & Breadth-First Search Explained (OCR / AQA) | S12:Ep5

A-Level Computer Science – Depth-First & Breadth-First Search Explained (OCR / AQA) | S12:Ep5

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13 Apr 14min

A-Level Computer Science – Merge Sort & Quick Sort Explained (OCR / AQA) | S12:Ep4

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This episode provides an overview of merge sort and quick sort algorithms, crucial topics for A Level Computer Science. It begins by explaining the core steps of merge sort, including dividing a list ...

9 Apr 14min

A-Level Computer Science – Bubble Sort & Insertion Sort Explained (OCR / AQA) | S12:Ep3

A-Level Computer Science – Bubble Sort & Insertion Sort Explained (OCR / AQA) | S12:Ep3

This repisode, provides an overview of sorting algorithms, specifically bubble sort and insertion sort. It highlights the importance of choosing an efficient sorting algorithm due to the potentially l...

6 Apr 13min

A-Level Computer Science – OCR NEA Iterative Development Explained (OCR H446) | Bonus 4

A-Level Computer Science – OCR NEA Iterative Development Explained (OCR H446) | Bonus 4

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